en echelon

en echelon

[′en ‚esh·ə‚län]
(geology)
Referring to an overlapped or staggered arrangement of geologic features.
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References in periodicals archive ?
Drill testing of multiple parallel, en echelon structures
The en echelon 1 to 10 m-wide shear structures are persistent at depth and often merge in that direction too.
According to Hebert, "the Cortez district deposits which include Pipeline, Cortez Hills and now Goldrush lie in an en echelon pattern that trends from the northwest to southeast.
Generally the prospect has been previously interpreted as an en echelon shear system striking northwest and dipping 65 degrees to the south-west.
This 2012 fieldwork has validated TerraX's original interest in the Forty Creek epithermal area, which is now known to contain a number of variably mineralized en echelon quartz veins, with locally high grade gold and silver mineralization that will be a priority target of our next drill program at Stewart.
The analysis on the data of exploration shows that within the mineralized belt the ore bodies continue along with the strike and distribute in parallel and en echelon arrangement.
A third possible en echelon gold-bearing zone has been found to the southwest of Lemagna, where prospectors developed pits and shafts into gold-bearing quartz along a swampy area several hundred metres in length.
Gold at Vargbacken is visible, free and coarse grained, and occurs in three or more en echelon high grade "bonanza" structures within a 40-50m wide gold-bearing mineralized halo.
The 'Main Prospect' is the most developed gold target on the Tudor Property and consists of a series of en echelon silicified fault structures which cut a unit of rhyolite tuff.
The major mineralized structures at the JAE property have a well-defined, north- northwesterly trend and steep easterly dip, with local en echelon offsets to the veins.
2 miles) section where the rhyolite unit averages 50 to 125 metres (164 - 410 ft) wide, a series of en echelon fractures ranging 0.